Custom Lookups are functionality within SAP Fieldglass that facilitate custom logic for various areas within the application. Based on keys and values a customer can define within a lookup table, the application utilizes that data to help determine and direct a user to a particular object or result based on the logic and variables that are defined within the functionality.
The custom lookup illustrated here was created to determine when and how a supplier’s rates should change based upon the defined segments.
![Screenshot of a Custom Lookup details page showing the tiered segments that define the logic of the lookup.](/service/media/topic/a6ca7e1a-a6e8-418c-a239-0ed2e462b444/FG510_2311_en-US_media/FG510_2311_en-US_images/CustomLookups.png)